From 034777d7f5c6bc5326184ffa63b7a840ef0e9759 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Thu, 19 Apr 2018 08:43:11 -0700 Subject: [PATCH] rcutorture: Print end-of-test state This commit adds end-of-test state printout to help check whether RCU shut down nicely. Note that this printout only helps for flavors of RCU that are not used much by the kernel. In particular, for normal RCU having a grace period in progress is expected behavior. Signed-off-by: Paul E. McKenney Tested-by: Nicholas Piggin --- kernel/rcu/rcutorture.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 680c96d8c00f..fd86965b33a7 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1609,6 +1609,9 @@ static enum cpuhp_state rcutor_hp; static void rcu_torture_cleanup(void) { + int flags = 0; + unsigned long gpnum = 0; + unsigned long completed = 0; int i; rcutorture_record_test_transition(); @@ -1639,6 +1642,11 @@ rcu_torture_cleanup(void) fakewriter_tasks = NULL; } + rcutorture_get_gp_data(cur_ops->ttype, &flags, &gpnum, &completed); + srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, + &flags, &gpnum, &completed); + pr_alert("%s: End-test grace-period state: g%lu c%lu f%#x\n", + cur_ops->name, gpnum, completed, flags); torture_stop_kthread(rcu_torture_stats, stats_task); torture_stop_kthread(rcu_torture_fqs, fqs_task); for (i = 0; i < ncbflooders; i++)